Mold for compressing slightly-plastic materials.



J. DRAENERT. MOLD FOR GOMPRBSSING SLIGHTLY PLASTIC MATERIALS.

APPLICATION FILED AUG. 4, 1908.

Patented June' 1, 1909.

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\NvEN'roR, JQHANNE DRAENERT,

Attm'ngg.

J. DRAENERT MOLD FOR OOMPRESSING SLIGHTLY PLASTIG MATERIALS.

APPLICATION FILED AUG. 4, 1908. v

Patented June 1, 1909.

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Zilllll WITNESSES;

UNITED STATES PATENT OFFICE.

JOHANNE S DBAENERLDF EILENBURG, GERMANY.

MOLD FOR coMeREssmG' SLIGHTLY-PLASTIQ MATERIALS.

To all 'whom it may cohcern:

Specification of Letters Patent.

Be it known that I, JOH-ANNES I)RAENERT,

a subject --of the King of Prussia, .(irerinan Emperor, residing at Eilenburg, in the Kingdom of Saxony, Germany, have invented a certain new and useful Improved Mold for CompressingSlightlyPlastic Materials, of which the following is a full,

1 clear, and exact description.

The present invention relates to means for producing .partlally hollow bricks or the like, i. e. bricks through which the recesses or hollows do not extend entirely through the material from one side to the other,.of

materials which do not yield much underpressure. In pressing materials of this kind, when; the brick has different thicknesses at different points, it is necessary to fill the mold to correspondin depths because the material, bein of a shghtly plastic nature, unlike clay or 0am, w1ll not yield in difierent directions when subjected to pressure in one direction and unless the mold is properly filled at the different points, the compressed article will be too hard at some parts and too soft at others, rendering it useless for the object in view,. thus for instance in making lime and sand or cement sand bricks, in which case the materials are compressed in a comparatively dry state, and if itis desired to compress the material-in the proportion of 2:1, the materials must be filled .into the mold at double the required height for each partof the brick. I

According to the present invention thebricks are formed by the aid of a double acting pressure die as herein after set forth;

In order to render the present specification easily intelligible reference is had to, the accompanying drawings in which similar letters of reference denote similar parts throughout the several views:-

Figure 1 indicates a finished brick, Fig. 2 shows the'amount of filling in dotted lines, in making the brick, Fig. 3 shows the mold with the filling, Fig.4.-v shows a mold with movable bottom, Flg. 5 is a vertical part section through a mold and die according to the-present invention, Fig. 6 isa cross section through the mold and die of Fig. 5 1n "a horizontal plane, Figs. 7, 8 and 9 are vertical sections showing theoperation of the mold and die and Fig. 10 is a part sectional plan ofthe table of the machine showing the molds. r

.hitherto shaped filling devices have Thus for a brick as illustrated in Fig". 1, the filling would have to be that shown in dotted lines in Fig. 2 or in the mold in Fig. In order to attain this proper filling,

been employed which were' placed in the mold from the top. The desired filling could also be attained without the shaped filling devices, when a bottom plate 6 was employed,'for the mold 'a as-illustrated in'Fig. l, the free space remaining having the form of the filling, turned bottom up. Thus in order to attain the filling shown in Fig. 3 it was only necessary to fill. up the mold of Patented June 1,1909. Application ma August 4, 1903. Serial No. 44e,941.

Fig. 4 and level it off smoothly at the top.

Thus the desired filling for a compression of 2:1 is attained, e. there is exactly double the thickness of material at each part of the mold, as the finished brick will have.

In order to compress the material to the form of brick shown in Fig. 1, a difierent die will have to be substituted for the bottom plate 6, the shape of which will have to correspond exactly with the shape of the finished brick. Since however the plate I) could not be removed without the material falling together, it was necessary to turn the whole'inold over and totake out the shaped bottom plate I) from the top and then to-place the proper die in position. In order to simplify th1s complicated method of working according to the present invention a die 1s provided consisting of two independently movable members 0 and d, the

inner member 0 of which, as will be seen from Figs. 5 and 7 extends beyond the outer. member d as illustrated in Fig. 4, thus forming the required outline for the filling. With the two members of the die in this position, the mold is operated by the rotating table a to pass beneaththe filling hopper f'(Fig. 7 where'it is filled in the necessary manner and the top smoothed over evenly. During this operation, .the member at of the die stands on a guide path it of the machine by -means of its roll g, while the inner member 0 rests loosel by'means of lateral projections ii on a justable screws Z Z of the inner surface of the lower mold walls. Thus the inner member 0 is freely suspended above the vertical plunger we, so as to leave a free intermediate space of a certain height above the upper surface of the plunger m in the inter'ior of'the member c.

After the mold has been filled the table 0 turns. a 'furtherstep and brings the contents .25 a mold upwardly,

' through the above mentioned free space, will will cause the roll 9 to duced part come into contact with the lower surface of the member a and take this upwardly also.

Thus the thinner contents of the mold willnowlbe compressed (Fig. 8). The position -q'of the members a and d toward: each other 15 andalso as regards the shape'of the article being formed is such that when both members 0 and d have reached their highest positions, the contents of the mold will have been compressed to half their turn, the mold,

the ejecting device, bottom plate with the com pushed up extending the from which it may now be removed, (Fig. 9). The further rotation ofithe table on to'the'reressed article is to an mcline,'alo ng which-the'bottom plate of the moldmay 'elther fall'by gravity or pression of plastic nature :will beevenly carried out at all parts of the brick, the two members automatically changing the form of the die finally again reaching the inner'member 0 will. be caught by the ing attaine A similar result might' be attained bysuitable means may be employed to depress itready .for thenext operation. The downward-imovement of the two members a and d is limited by the roll 9 of the outer member adjusting screws-Z Z and both members will be returned to their initial positions. Thus by means of'th'epresent invention, the filling of the mold to the roper height at the various 'pointsof the rickand also the comthe material which is of a slightly during the (pressing operation, the result bein a simple and exact manner.

pressing the material rom the top downwardly, in'this case the member d would be original height at all points: As the table 6 continues towith the die consisting of the 7 two members 0 and d, will be brought above i by means of which the rick out of the of the guide rail and thence on theguide rail h while 1 kept stationary, while the support for themember 0 could be rendered yielding, so that in pressin the member 0 would be depressed to sue an extent that in its lowest position, the correct thickness for the bottom plate would be,attained.

The construction of the member (2 is of particular importance. As will be seen from Fig. 6, at the parts whichcontact with the guide walls, it is provided with correspondingly broad grooves extending from the top -to the bottom as. indicated at q and whic open' into inclined ports 9' extending from the interior hollow. The object of this ar .rangement is to conduct ofl any material falling between the parts c and d, since the material being of a nature but slightly plastic-would otherwise rind and dam e the'contacting surfaces 0 the two movab e members.

..I claim as my invention In a mold for compressing materials 'having but slightly plastic properties, the combination of a bottom formed of two movable members adapted, while the -mold is beingfilled to enlarge the same relatively and correspondingly to the various thick- .nesses of the article to be attained and means for operating the said members to compress the material to the said thicknesses in consecutive movements.

i2. In a mold for compressing materials having but slightly plastic properties, the combination of a bottom formed of two'movable members, adapted, while the mold is being filled to enlarge the same relatively 'andcorrespondingly to the various thicknesses of the article to be attained, means for operating the said members to compress the material tozthe said thicknesses in consecutive movements and substantially vertically disposed grooves located between the adjacent walls of the said members and having ports at the upper end communicating with the-interior of-the mold ass ecified. In testimony whereof I afhx my signature in the presence of two witnesses.

4 Y ,JOHANNES DRAENERT. Witnesses: i

Monrra SPREER, RUDOLPH Fmcim. 

